IBM PC/AT 5170

IBM PC · 1984

The machine that set the shape of every PC since: the AT introduced the 16-bit ISA slot, the 84-key layout that became the enhanced keyboard, the 1.2MB floppy and the battery-backed CMOS clock. Its 80286 brought protected mode to the desk, though DOS never used it. Built like a safe, with a front keylock and a power supply that will outlive its owner. The type 1 board at 6MHz is the earlier and scarcer of the two.

As catalogued

Maker
IBM
CPU
Intel 80286-6
Memory
256K, 512K, 640K
Board issues
Type 1 planar (6 MHz), Type 2 planar (6 MHz), Type 3 planar (8 MHz)
Regions
US, UK, Europe
Chassis
desktop, eight slots, a key lock on the front
OS
IBM PC DOS 3.0

Chips

3
CPU
Intel 80286, Intel 80286-8
FPU
Intel 8087, Intel 80287
BIOS ROM
BIOS 01/10/84, BIOS 06/10/85, BIOS 11/15/85

In this collection

2